Definitely the real deal. I've taken phenibut off and on for about a year, and this is easily 2-3x stronger. You really have to be careful with the dosage because even a little bit over the recommended dose will leave you incapable of doing anything except passing out in bed. That said, this doesn't give me the horrible come-down that phenibut tends to do if I take more than 1.5g. It's a bit too pricey (for me) to have it replace phenibut entirely (plus I'm in the EU, so not as easy to come by as in the US), but all in all I'm quite satisfied with this product.